<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a{
            width: 300px;
            height: 300px;
            background-color: #000;
            transform: scale(.5);

            transform-origin: 300px 150px;
        }
    </style>
</head>
<body>

    <div class="a"></div>
    
</body>
</html>